Next here this evening, to the American neighborhood where they spent this Sunday trying to save an entire block of homes. This was the frightening scene from over head near Orlando. The massive sinkhole there. Steve osunsami on the newest case of Florida's shifting Earth. Reporter: It's happening again. Two homes outside Orlando were just inches from falling into the Earth. A sinkhole 50-foot deep. It's scary. Reporter: Workers racing to save the homes as more ground caved in. This is, by far, the most extreme that I have seen it. Where we've been actually working on a home and things are opening up. Reporter: Crews have been working for weeks filling sink holes. They're popping up more an more and more. Reporter: She's right. Florida is sinkhole central. Dozens of families at this orlando-area vacation resort had to run for their lives in August. You don't see a building every day twisting as if it's in a vortex. Reporter: Outside Tampa, a man was swallowed whole, sleeping in his bed. Thousands of possible sinkholes are waiting to open up. Underground water washes away the limestone and the Earth falls in. This morning, the hole filled with sand and concrete. Families here still nervous tonight. Steve osunsami, ABC news, Atlanta.

This transcript has been automatically generated and may not be 100% accurate.

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